Hot-air furnace or heater.



N0. 64|,687. Patented Jan. 23, I900. U. S. FORTINER.

HOT AIR FURNACE 0R HEATER.

A ue'azimmed Aug. 17. 1898.) (No Model.) 2 Sheets$heet I.

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No. 64l,687.

Patented Jan. 23, I900.

'u. s. FORTINER.

HOT AIR FURNACE ORHEATER.

(Application filed Aug. 17, 1898.)

2 Sheds-Sheet 2.

(No Model.)

FFICE.

URIAS S. FORTINER, OF PHILADELPHIA, PENNSYLVANIA.

HOT-AIR FURNACE OR HEATER.

SPECIFICATION forming p art of Letters Patent No. 641,687, dated January 23', 1900.

Application filed August17, 1898. Serial No. 688,788. (No model.)

T0 (tZZ whom it may concern:

Be it known that I, URIAS S. FORTINER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Hot-Air Furnaces or Heaters, of which the following:

is a specification.

My invention relates to a new and useful improvement in hot-air furnaces or heaters, and has for one object to improve upon the construction of such a furnace; and a further object of my invention is to combine with a furnace of this description a water-heating apparatus whereby a portion of the heat of the furnace will be utilized in heating water for domestic or like purposes.

With these ends in view this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanying drawings, forming a part of this specification, in which- Figure l is a vertical section of a furnace made in accordance with my improvement, showing the heating apparatus in position; Fig. 2, a section taken at the line a m; Fig.

,3, a similar view taken at the line y y; Fig.

4, a similar view taken at the line 2 2; Fig. 5, a verticalsection of an ordinary furnace having myimproved water-heating apparatus applied thereto; Fig. 6, a detail ofone of-the joints whereby the baffle-plates and other parts are made air-tight at their meeting edges; and Fig. 7 is'a detail section of a portion of one of the decks, showing the means for providing an expansible joint whereby these heads may be permitted to vary with the expansion and contraction due to the changes of temperature.

In carrying out my invention as here embodied A represents the outer casing of the furnace, having located therein the fire-pot B, which is composed ofsections of cast-iron so formed as to produce a cylinder. Inside of the outer casing is located a cylindrical casing O, which is of a'diameter sufficient to leave a space between itself and the'outer casing, which space is indicated by D. The upper end of this casing is closed by a partition or deck E, the latter having a downturned flange F, which fits within an annular groove or channel G, formed within the upper edge of the casing O, and in practice this channel is partially filled with asbestos fiber or similar material, so that whenthe flange is fitted therein an air-tight joint is formed.

H represents another casing or cylindrical partition, which is arranged inside of the cas ing 0 and at a sufficient distance therefrom to form a space I, and this casing extends from the deck E to the horizontal partition J, the latter being rotated on a level with the top of the fire-pot. A horizontal partition K also divides the space in sections for the purpose hereinafter set forth.

Lis a deck-head which closes a central opening in the deck E and serves as a baffle-plate, being fitted to the deck by its edges extending into the channel M, formed around the opening, said channel being partially filled with asbestos fiber, so as to make an air-tight joint at this point. This deck-head has a flange N of considerable width formed therewith and by means of which the rods 0 are utilized to secure the deck-head in place, said rods having their lower ends hooked, as indicated at P, and engaging the lower deck or partition Q, while their upper ends pass through the flange N and are threaded for the reception of the nuts B. These rods are shown as passing through the hot-air pipes S, said pipes extending from the lower to the upper deck and being jointed thereto by suitable channels or grooves, in which the edges of the pipes fit and in which a suitable amount of asbestos fiber is placed for making the joint air-tight. The lower deck is held in position by the rods T, having their upper ends hooked over the upper edge of the partition 0, while their lower ends are threaded and passed through the ears U and have the nuts V run thereon, as shown.

WV is a water-ring of suitable size, being hollow and having its interior connected with a suitable water-supply by the pipe X, while the pipe Y leads from this ring and passes upward through the baffle-plate Z and also through the deck-head L and, finally, through the top of the furnace to any suitable boiler or other point.

The baffle-plate Z is so located as to cause the products of combustion to be deflected when arising from the fire-pot, and thereafter these products will pass around the edges of the baffle-plate and upward into the space immediately above the same. After this they will pass through the opening a, as indicated by the arrow, thus gaining access to the space I, in which they will circulate, and then pass downward through the holes I) in the partition R and, reaching the lower section of the space I and after circulating therein, pass therefrom through the holes d, as shown by the arrow, to the larger space immediately around the walls of the fire-pot, it being assumedthatthedamperfisclosed. Theprodnets of eombust-ionnext leave the space (2 through the flue g and pass upward to the chimney through the flue g, a damper h being located within this last-named flue, so as to regulate the flow of these products of combustion. A short flue i, in which the damperfis located, connects with the flue r, so that when this damper is open the products of combustion will pass directly from the upper portion of the space I to the flue g, and this is for the purpose of increasing the draft for starting or reviving the fire in the fire-pot. The air passing through the pipes S, as indicated by the arrow, will of course be heated before reaching the top of the furnace, and, as is shown, from thence it is distributed by suitable pipesj. From this description it will be seen that not only will the water circulating through the ring W and pipes X and Y be heated, but this construction of furnace will utilize nearly the entire amount of heat contained in the products of combustion in raising the temperature of the air passing through the pipes S, and the arrangement of the furnace is such that its action is easily regulated.

In Fig. 5 I have illustrated how my i mprovement may be applied to an ordinary furnace, and in this figure A represents the outer casing, B the inner casing, and C the space formed between these two casings. The upp deck D has the central portion thereof cut out and a head E fitted thereto, while the baffle-plate F is located upon the pipe G, said pipe also connected with the supporting or water ring 11 in the same manner as before described. This water-ring should be of a diameter which would permit it being passed through the opening by removing the grate. The water-ring will be supported by two lugs resting on the fire-pot, I being the induction-pipe passed through the wall of the fire-pot and connected with the water-ring forming the third rest, as clearly shown.

In practice I use a temporary cement of silicate of soda or othersuitable composition in connection with asbestos fiber to place between the meeting edges of the sections which form the fire-pot B, the object being that this temporary cement shall hold the fiber in place during the assembling of the pot, and thereafter the burning out of this temporary cement will not affect the joint in that the fiber will continue to close the space between the meeting edges of the sections thereof. A particular advantage of the water ring here shown is that it is so located that the products of combustion will completely surround the same, thereby imparting more heat thereto than would be the case were only apart of this ring exposed, while at the same time the heat being thus uniformly imparted with the ring will increase the life thereof, since it will not be deteriorated by expansion and contraction.

I provide for the expansion and contraction of the decks by so casting them as not to complete the ring, but leavinga slight space A between the ends thereof, and then fitting a plate B thereon and bolti mg the same in place. as indicated at G a suitable packing of asbestos fiber D being placed between the plate and the deck in order to make an air-tight joint. This, as is obvious, will permit the plate to go and come with expansion and contraction, and thereby avoid the undue strains which have hitherto been the cause of cracking and breaking a large percentage of such decks.

Of course I do not wish to be limited to the exact construction of the furnace, since this may be varied to a certain degree without dcparting from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is- 1. In combination, a furnace of the character described, an inner casing so disposed within the outer casing of the furnace as to produce a space therebetween, an intermediate casing between the inner and outer casing, a deck for closing the upper end of the inner casing, a deck for closing the lower end of the inner easing, rods so arranged as to tie these parts together, a deck closing the space between the outer and intermediate casing, having flanged edges embedded in asbestos fiber, a channel formed with the upper edge of the casing G, hot-air pipes extending through the two decks so as to form passages for the air, a cone-shaped deck-head for closing the central opening in the upper deck, rods for securing this head in place, a circular partition located inside the inner casing so as to form a space a series of openings for causing the products of combustion to follow a circuitous outlet, draft-fines leading from the furnace and suitable dampers located therein for regulating the draft, as specified.

2. In combination with a furnace of the character described, decks or horizontal partitions formed in ring shape, the ends of which do not meet, a joint formed at these ends con- IO tos fiber placed therein and flanges formed upon the deck-head for fitting within said groove against the fiber, as and for the purpose described.

In testimony whereof I have hereunto af fixed my signature in the presence of two sub- I 5 scribing witnesses.

URIAS S. FORTINER. Witnesses:

MARY I. CRAWFORD, SAMUEL STUART. 

